gl_backend.c

   1
   2 #include "quakedef.h"
   3 #include "cl_collision.h"
   4
   5 cvar_t gl_mesh_drawrangeelements = {0, "gl_mesh_drawrangeelements", "1", "use glDrawRangeElements function if available instead of glDrawElements (for performance comparisons or bug testing)"};
   6 cvar_t gl_mesh_testarrayelement = {0, "gl_mesh_testarrayelement", "0", "use glBegin(GL_TRIANGLES);glArrayElement();glEnd(); primitives instead of glDrawElements (useful to test for driver bugs with glDrawElements)"};
   7 cvar_t gl_mesh_testmanualfeeding = {0, "gl_mesh_testmanualfeeding", "0", "use glBegin(GL_TRIANGLES);glTexCoord2f();glVertex3f();glEnd(); primitives instead of glDrawElements (useful to test for driver bugs with glDrawElements)"};
   8 cvar_t gl_mesh_prefer_short_elements = {0, "gl_mesh_prefer_short_elements", "1", "use GL_UNSIGNED_SHORT element arrays instead of GL_UNSIGNED_INT"};
   9 cvar_t gl_paranoid = {0, "gl_paranoid", "0", "enables OpenGL error checking and other tests"};
  10 cvar_t gl_printcheckerror = {0, "gl_printcheckerror", "0", "prints all OpenGL error checks, useful to identify location of driver crashes"};
  11
  12 cvar_t r_render = {0, "r_render", "1", "enables rendering 3D views (you want this on!)"};
  13 cvar_t r_renderview = {0, "r_renderview", "1", "enables rendering 3D views (you want this on!)"};
  14 cvar_t r_waterwarp = {CVAR_SAVE, "r_waterwarp", "1", "warp view while underwater"};
  15 cvar_t gl_polyblend = {CVAR_SAVE, "gl_polyblend", "1", "tints view while underwater, hurt, etc"};
  16 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1", "enables OpenGL dithering (16bit looks bad with this off)"};
  17 cvar_t gl_lockarrays = {0, "gl_lockarrays", "0", "enables use of glLockArraysEXT, may cause glitches with some broken drivers, and may be slower than normal"};
  18 cvar_t gl_lockarrays_minimumvertices = {0, "gl_lockarrays_minimumvertices", "1", "minimum number of vertices required for use of glLockArraysEXT, setting this too low may reduce performance"};
  19 cvar_t gl_vbo = {CVAR_SAVE, "gl_vbo", "3", "make use of GL_ARB_vertex_buffer_object extension to store static geometry in video memory for faster rendering, 0 disables VBO allocation or use, 1 enables VBOs for vertex and triangle data, 2 only for vertex data, 3 for vertex data and triangle data of simple meshes (ones with only one surface)"};
  20 cvar_t gl_fbo = {CVAR_SAVE, "gl_fbo", "1", "make use of GL_ARB_framebuffer_object extension to enable shadowmaps and other features using pixel formats different from the framebuffer"};
  21
  22 cvar_t v_flipped = {0, "v_flipped", "0", "mirror the screen (poor man's left handed mode)"};
  23 qboolean v_flipped_state = false;
  24
  25 r_viewport_t gl_viewport;
  26 matrix4x4_t gl_modelmatrix;
  27 matrix4x4_t gl_viewmatrix;
  28 matrix4x4_t gl_modelviewmatrix;
  29 matrix4x4_t gl_projectionmatrix;
  30 matrix4x4_t gl_modelviewprojectionmatrix;
  31 float gl_modelview16f[16];
  32 float gl_modelviewprojection16f[16];
  33 qboolean gl_modelmatrixchanged;
  34
  35 int gl_maxdrawrangeelementsvertices;
  36 int gl_maxdrawrangeelementsindices;
  37
  38 #ifdef DEBUGGL
  39 int errornumber = 0;
  40
  41 void GL_PrintError(int errornumber, char *filename, int linenumber)
  42 {
  43         switch(errornumber)
  44         {
  45 #ifdef GL_INVALID_ENUM
  46         case GL_INVALID_ENUM:
  47                 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
  48                 break;
  49 #endif
  50 #ifdef GL_INVALID_VALUE
  51         case GL_INVALID_VALUE:
  52                 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
  53                 break;
  54 #endif
  55 #ifdef GL_INVALID_OPERATION
  56         case GL_INVALID_OPERATION:
  57                 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
  58                 break;
  59 #endif
  60 #ifdef GL_STACK_OVERFLOW
  61         case GL_STACK_OVERFLOW:
  62                 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
  63                 break;
  64 #endif
  65 #ifdef GL_STACK_UNDERFLOW
  66         case GL_STACK_UNDERFLOW:
  67                 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
  68                 break;
  69 #endif
  70 #ifdef GL_OUT_OF_MEMORY
  71         case GL_OUT_OF_MEMORY:
  72                 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
  73                 break;
  74 #endif
  75 #ifdef GL_TABLE_TOO_LARGE
  76         case GL_TABLE_TOO_LARGE:
  77                 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
  78                 break;
  79 #endif
  80 #ifdef GL_INVALID_FRAMEBUFFER_OPERATION_EXT
  81         case GL_INVALID_FRAMEBUFFER_OPERATION_EXT:
  82                 Con_Printf("GL_INVALID_FRAMEBUFFER_OPERATION at %s:%i\n", filename, linenumber);
  83                 break;
  84 #endif
  85         default:
  86                 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
  87                 break;
  88         }
  89 }
  90 #endif
  91
  92 #define BACKENDACTIVECHECK if (!gl_state.active) Sys_Error("GL backend function called when backend is not active");
  93
  94 void SCR_ScreenShot_f (void);
  95
  96 typedef struct gl_bufferobjectinfo_s
  97 {
  98         int target;
  99         int object;
 100         size_t size;
 101         char name[MAX_QPATH];
 102 }
 103 gl_bufferobjectinfo_t;
 104
 105 typedef struct gltextureunit_s
 106 {
 107         const void *pointer_texcoord;
 108         size_t pointer_texcoord_offset;
 109         int pointer_texcoord_buffer;
 110         int t2d, t3d, tcubemap, trectangle;
 111         int arrayenabled;
 112         unsigned int arraycomponents;
 113         int rgbscale, alphascale;
 114         int combine;
 115         int combinergb, combinealpha;
 116         // texmatrixenabled exists only to avoid unnecessary texmatrix compares
 117         int texmatrixenabled;
 118         matrix4x4_t matrix;
 119 }
 120 gltextureunit_t;
 121
 122 typedef struct gl_state_s
 123 {
 124         int cullface;
 125         int cullfaceenable;
 126         int blendfunc1;
 127         int blendfunc2;
 128         int blend;
 129         GLboolean depthmask;
 130         int colormask; // stored as bottom 4 bits: r g b a (3 2 1 0 order)
 131         int depthtest;
 132         float depthrange[2];
 133         float polygonoffset[2];
 134         int alphatest;
 135         int scissortest;
 136         unsigned int unit;
 137         unsigned int clientunit;
 138         gltextureunit_t units[MAX_TEXTUREUNITS];
 139         float color4f[4];
 140         int lockrange_first;
 141         int lockrange_count;
 142         int vertexbufferobject;
 143         int elementbufferobject;
 144         qboolean pointer_color_enabled;
 145         const void *pointer_vertex;
 146         const void *pointer_color;
 147         size_t pointer_vertex_offset;
 148         size_t pointer_color_offset;
 149         int pointer_vertex_buffer;
 150         int pointer_color_buffer;
 151
 152         memexpandablearray_t bufferobjectinfoarray;
 153
 154         qboolean active;
 155 }
 156 gl_state_t;
 157
 158 static gl_state_t gl_state;
 159
 160
 161 /*
 162 note: here's strip order for a terrain row:
 163 0--1--2--3--4
 164 |\ |\ |\ |\ |
 165 | \| \| \| \|
 166 A--B--C--D--E
 167 clockwise
 168
 169 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
 170
 171 *elements++ = i + row;
 172 *elements++ = i;
 173 *elements++ = i + row + 1;
 174 *elements++ = i;
 175 *elements++ = i + 1;
 176 *elements++ = i + row + 1;
 177
 178
 179 for (y = 0;y < rows - 1;y++)
 180 {
 181         for (x = 0;x < columns - 1;x++)
 182         {
 183                 i = y * rows + x;
 184                 *elements++ = i + columns;
 185                 *elements++ = i;
 186                 *elements++ = i + columns + 1;
 187                 *elements++ = i;
 188                 *elements++ = i + 1;
 189                 *elements++ = i + columns + 1;
 190         }
 191 }
 192
 193 alternative:
 194 0--1--2--3--4
 195 | /| /|\ | /|
 196 |/ |/ | \|/ |
 197 A--B--C--D--E
 198 counterclockwise
 199
 200 for (y = 0;y < rows - 1;y++)
 201 {
 202         for (x = 0;x < columns - 1;x++)
 203         {
 204                 i = y * rows + x;
 205                 *elements++ = i;
 206                 *elements++ = i + columns;
 207                 *elements++ = i + columns + 1;
 208                 *elements++ = i + columns;
 209                 *elements++ = i + columns + 1;
 210                 *elements++ = i + 1;
 211         }
 212 }
 213 */
 214
 215 int polygonelement3i[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 216 unsigned short polygonelement3s[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 217 int quadelement3i[QUADELEMENTS_MAXQUADS*6];
 218 unsigned short quadelement3s[QUADELEMENTS_MAXQUADS*6];
 219
 220 void GL_VBOStats_f(void)
 221 {
 222         GL_Mesh_ListVBOs(true);
 223 }
 224
 225 static void GL_Backend_ResetState(void);
 226
 227 static void gl_backend_start(void)
 228 {
 229         memset(&gl_state, 0, sizeof(gl_state));
 230
 231         Mem_ExpandableArray_NewArray(&gl_state.bufferobjectinfoarray, r_main_mempool, sizeof(gl_bufferobjectinfo_t), 128);
 232
 233         Con_DPrintf("OpenGL backend started.\n");
 234
 235         CHECKGLERROR
 236
 237         GL_Backend_ResetState();
 238 }
 239
 240 static void gl_backend_shutdown(void)
 241 {
 242         Con_DPrint("OpenGL Backend shutting down\n");
 243
 244         Mem_ExpandableArray_FreeArray(&gl_state.bufferobjectinfoarray);
 245
 246         memset(&gl_state, 0, sizeof(gl_state));
 247 }
 248
 249 static void gl_backend_newmap(void)
 250 {
 251 }
 252
 253 void gl_backend_init(void)
 254 {
 255         int i;
 256
 257         for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
 258         {
 259                 polygonelement3s[i * 3 + 0] = 0;
 260                 polygonelement3s[i * 3 + 1] = i + 1;
 261                 polygonelement3s[i * 3 + 2] = i + 2;
 262         }
 263         // elements for rendering a series of quads as triangles
 264         for (i = 0;i < QUADELEMENTS_MAXQUADS;i++)
 265         {
 266                 quadelement3s[i * 6 + 0] = i * 4;
 267                 quadelement3s[i * 6 + 1] = i * 4 + 1;
 268                 quadelement3s[i * 6 + 2] = i * 4 + 2;
 269                 quadelement3s[i * 6 + 3] = i * 4;
 270                 quadelement3s[i * 6 + 4] = i * 4 + 2;
 271                 quadelement3s[i * 6 + 5] = i * 4 + 3;
 272         }
 273
 274         for (i = 0;i < (POLYGONELEMENTS_MAXPOINTS - 2)*3;i++)
 275                 polygonelement3i[i] = polygonelement3s[i];
 276         for (i = 0;i < QUADELEMENTS_MAXQUADS*3;i++)
 277                 quadelement3i[i] = quadelement3s[i];
 278
 279         Cvar_RegisterVariable(&r_render);
 280         Cvar_RegisterVariable(&r_renderview);
 281         Cvar_RegisterVariable(&r_waterwarp);
 282         Cvar_RegisterVariable(&gl_polyblend);
 283         Cvar_RegisterVariable(&v_flipped);
 284         Cvar_RegisterVariable(&gl_dither);
 285         Cvar_RegisterVariable(&gl_lockarrays);
 286         Cvar_RegisterVariable(&gl_lockarrays_minimumvertices);
 287         Cvar_RegisterVariable(&gl_vbo);
 288         Cvar_RegisterVariable(&gl_paranoid);
 289         Cvar_RegisterVariable(&gl_printcheckerror);
 290
 291         Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
 292         Cvar_RegisterVariable(&gl_mesh_testarrayelement);
 293         Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
 294         Cvar_RegisterVariable(&gl_mesh_prefer_short_elements);
 295
 296         Cmd_AddCommand("gl_vbostats", GL_VBOStats_f, "prints a list of all buffer objects (vertex data and triangle elements) and total video memory used by them");
 297
 298         R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
 299 }
 300
 301 void GL_SetMirrorState(qboolean state);
 302
 303 void R_Viewport_TransformToScreen(const r_viewport_t *v, const vec4_t in, vec4_t out)
 304 {
 305         vec4_t temp;
 306         float iw;
 307         Matrix4x4_Transform4 (&v->viewmatrix, in, temp);
 308         Matrix4x4_Transform4 (&v->projectmatrix, temp, out);
 309         iw = 1.0f / out[3];
 310         out[0] = v->x + (out[0] * iw + 1.0f) * v->width * 0.5f;
 311         out[1] = v->y + v->height - (out[1] * iw + 1.0f) * v->height * 0.5f;
 312         out[2] = v->z + (out[2] * iw + 1.0f) * v->depth * 0.5f;
 313 }
 314
 315 static void R_Viewport_ApplyNearClipPlane(r_viewport_t *v, float normalx, float normaly, float normalz, float dist)
 316 {
 317         float q[4];
 318         float d;
 319         float clipPlane[4], v3[3], v4[3];
 320         float normal[3];
 321
 322         // This is inspired by Oblique Depth Projection from http://www.terathon.com/code/oblique.php
 323
 324         VectorSet(normal, normalx, normaly, normalz);
 325         Matrix4x4_Transform3x3(&v->viewmatrix, normal, clipPlane);
 326         VectorScale(normal, dist, v3);
 327         Matrix4x4_Transform(&v->viewmatrix, v3, v4);
 328         // FIXME: LordHavoc: I think this can be done more efficiently somehow but I can't remember the technique
 329         clipPlane[3] = -DotProduct(v4, clipPlane);
 330
 331 #if 0
 332 {
 333         // testing code for comparing results
 334         float clipPlane2[4];
 335         VectorCopy4(clipPlane, clipPlane2);
 336         R_EntityMatrix(&identitymatrix);
 337         VectorSet(q, normal[0], normal[1], normal[2], -dist);
 338         qglClipPlane(GL_CLIP_PLANE0, q);
 339         qglGetClipPlane(GL_CLIP_PLANE0, q);
 340         VectorCopy4(q, clipPlane);
 341 }
 342 #endif
 343
 344         // Calculate the clip-space corner point opposite the clipping plane
 345         // as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and
 346         // transform it into camera space by multiplying it
 347         // by the inverse of the projection matrix
 348         q[0] = ((clipPlane[0] < 0.0f ? -1.0f : clipPlane[0] > 0.0f ? 1.0f : 0.0f) + v->m[8]) / v->m[0];
 349         q[1] = ((clipPlane[1] < 0.0f ? -1.0f : clipPlane[1] > 0.0f ? 1.0f : 0.0f) + v->m[9]) / v->m[5];
 350         q[2] = -1.0f;
 351         q[3] = (1.0f + v->m[10]) / v->m[14];
 352
 353         // Calculate the scaled plane vector
 354         d = 2.0f / DotProduct4(clipPlane, q);
 355
 356         // Replace the third row of the projection matrix
 357         v->m[2] = clipPlane[0] * d;
 358         v->m[6] = clipPlane[1] * d;
 359         v->m[10] = clipPlane[2] * d + 1.0f;
 360         v->m[14] = clipPlane[3] * d;
 361 }
 362
 363 void R_Viewport_InitOrtho(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float x1, float y1, float x2, float y2, float nearclip, float farclip, const float *nearplane)
 364 {
 365         float left = x1, right = x2, bottom = y2, top = y1, zNear = nearclip, zFar = farclip;
 366         memset(v, 0, sizeof(*v));
 367         v->type = R_VIEWPORTTYPE_ORTHO;
 368         v->cameramatrix = *cameramatrix;
 369         v->x = x;
 370         v->y = y;
 371         v->z = 0;
 372         v->width = width;
 373         v->height = height;
 374         v->depth = 1;
 375         v->m[0]  = 2/(right - left);
 376         v->m[5]  = 2/(top - bottom);
 377         v->m[10] = -2/(zFar - zNear);
 378         v->m[12] = - (right + left)/(right - left);
 379         v->m[13] = - (top + bottom)/(top - bottom);
 380         v->m[14] = - (zFar + zNear)/(zFar - zNear);
 381         v->m[15] = 1;
 382         v->screentodepth[0] = -farclip / (farclip - nearclip);
 383         v->screentodepth[1] = farclip * nearclip / (farclip - nearclip);
 384
 385         Matrix4x4_Invert_Full(&v->viewmatrix, &v->cameramatrix);
 386         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, v->m);
 387
 388         if (nearplane)
 389                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 390
 391 #if 0
 392         {
 393                 vec4_t test1;
 394                 vec4_t test2;
 395                 Vector4Set(test1, (x1+x2)*0.5f, (y1+y2)*0.5f, 0.0f, 1.0f);
 396                 R_Viewport_TransformToScreen(v, test1, test2);
 397                 Con_Printf("%f %f %f -> %f %f %f\n", test1[0], test1[1], test1[2], test2[0], test2[1], test2[2]);
 398         }
 399 #endif
 400 }
 401
 402 void R_Viewport_InitPerspective(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float frustumx, float frustumy, float nearclip, float farclip, const float *nearplane)
 403 {
 404         matrix4x4_t tempmatrix, basematrix;
 405         memset(v, 0, sizeof(*v));
 406
 407         if(v_flipped.integer)
 408                 frustumx = -frustumx;
 409
 410         v->type = R_VIEWPORTTYPE_PERSPECTIVE;
 411         v->cameramatrix = *cameramatrix;
 412         v->x = x;
 413         v->y = y;
 414         v->z = 0;
 415         v->width = width;
 416         v->height = height;
 417         v->depth = 1;
 418         v->m[0]  = 1.0 / frustumx;
 419         v->m[5]  = 1.0 / frustumy;
 420         v->m[10] = -(farclip + nearclip) / (farclip - nearclip);
 421         v->m[11] = -1;
 422         v->m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 423         v->screentodepth[0] = -farclip / (farclip - nearclip);
 424         v->screentodepth[1] = farclip * nearclip / (farclip - nearclip);
 425
 426         Matrix4x4_Invert_Full(&tempmatrix, &v->cameramatrix);
 427         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 428         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 429         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 430
 431         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, v->m);
 432
 433         if (nearplane)
 434                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 435 }
 436
 437 void R_Viewport_InitPerspectiveInfinite(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float frustumx, float frustumy, float nearclip, const float *nearplane)
 438 {
 439         matrix4x4_t tempmatrix, basematrix;
 440         const float nudge = 1.0 - 1.0 / (1<<23);
 441         memset(v, 0, sizeof(*v));
 442
 443         if(v_flipped.integer)
 444                 frustumx = -frustumx;
 445
 446         v->type = R_VIEWPORTTYPE_PERSPECTIVE_INFINITEFARCLIP;
 447         v->cameramatrix = *cameramatrix;
 448         v->x = x;
 449         v->y = y;
 450         v->z = 0;
 451         v->width = width;
 452         v->height = height;
 453         v->depth = 1;
 454         v->m[ 0] = 1.0 / frustumx;
 455         v->m[ 5] = 1.0 / frustumy;
 456         v->m[10] = -nudge;
 457         v->m[11] = -1;
 458         v->m[14] = -2 * nearclip * nudge;
 459         v->screentodepth[0] = (v->m[10] + 1) * 0.5 - 1;
 460         v->screentodepth[1] = v->m[14] * -0.5;
 461
 462         Matrix4x4_Invert_Full(&tempmatrix, &v->cameramatrix);
 463         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 464         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 465         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 466
 467         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, v->m);
 468
 469         if (nearplane)
 470                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 471 }
 472
 473 float cubeviewmatrix[6][16] =
 474 {
 475     // standard cubemap projections
 476     { // +X
 477          0, 0,-1, 0,
 478          0,-1, 0, 0,
 479         -1, 0, 0, 0,
 480          0, 0, 0, 1,
 481     },
 482     { // -X
 483          0, 0, 1, 0,
 484          0,-1, 0, 0,
 485          1, 0, 0, 0,
 486          0, 0, 0, 1,
 487     },
 488     { // +Y
 489          1, 0, 0, 0,
 490          0, 0,-1, 0,
 491          0, 1, 0, 0,
 492          0, 0, 0, 1,
 493     },
 494     { // -Y
 495          1, 0, 0, 0,
 496          0, 0, 1, 0,
 497          0,-1, 0, 0,
 498          0, 0, 0, 1,
 499     },
 500     { // +Z
 501          1, 0, 0, 0,
 502          0,-1, 0, 0,
 503          0, 0,-1, 0,
 504          0, 0, 0, 1,
 505     },
 506     { // -Z
 507         -1, 0, 0, 0,
 508          0,-1, 0, 0,
 509          0, 0, 1, 0,
 510          0, 0, 0, 1,
 511     },
 512 };
 513 float rectviewmatrix[6][16] =
 514 {
 515     // sign-preserving cubemap projections
 516     { // +X
 517          0, 0,-1, 0,
 518          0, 1, 0, 0,
 519          1, 0, 0, 0,
 520          0, 0, 0, 1,
 521     },
 522     { // -X
 523          0, 0, 1, 0,
 524          0, 1, 0, 0,
 525          1, 0, 0, 0,
 526          0, 0, 0, 1,
 527     },
 528     { // +Y
 529          1, 0, 0, 0,
 530          0, 0,-1, 0,
 531          0, 1, 0, 0,
 532          0, 0, 0, 1,
 533     },
 534     { // -Y
 535          1, 0, 0, 0,
 536          0, 0, 1, 0,
 537          0, 1, 0, 0,
 538          0, 0, 0, 1,
 539     },
 540     { // +Z
 541          1, 0, 0, 0,
 542          0, 1, 0, 0,
 543          0, 0,-1, 0,
 544          0, 0, 0, 1,
 545     },
 546     { // -Z
 547          1, 0, 0, 0,
 548          0, 1, 0, 0,
 549          0, 0, 1, 0,
 550          0, 0, 0, 1,
 551     },
 552 };
 553
 554 void R_Viewport_InitCubeSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, float nearclip, float farclip, const float *nearplane)
 555 {
 556         matrix4x4_t tempmatrix, basematrix;
 557         memset(v, 0, sizeof(*v));
 558         v->type = R_VIEWPORTTYPE_PERSPECTIVECUBESIDE;
 559         v->cameramatrix = *cameramatrix;
 560         v->width = size;
 561         v->height = size;
 562         v->depth = 1;
 563         v->m[0] = v->m[5] = 1.0f;
 564         v->m[10] = -(farclip + nearclip) / (farclip - nearclip);
 565         v->m[11] = -1;
 566         v->m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 567
 568         Matrix4x4_FromArrayFloatGL(&basematrix, cubeviewmatrix[side]);
 569         Matrix4x4_Invert_Simple(&tempmatrix, &v->cameramatrix);
 570         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 571         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, v->m);
 572
 573         if (nearplane)
 574                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 575 }
 576
 577 void R_Viewport_InitRectSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, int border, float nearclip, float farclip, const float *nearplane)
 578 {
 579         matrix4x4_t tempmatrix, basematrix;
 580         memset(v, 0, sizeof(*v));
 581         v->type = R_VIEWPORTTYPE_PERSPECTIVECUBESIDE;
 582         v->cameramatrix = *cameramatrix;
 583         v->x = (side & 1) * size;
 584         v->y = (side >> 1) * size;
 585         v->width = size;
 586         v->height = size;
 587         v->depth = 1;
 588         v->m[0] = v->m[5] = 1.0f * ((float)size - border) / size;
 589         v->m[10] = -(farclip + nearclip) / (farclip - nearclip);
 590         v->m[11] = -1;
 591         v->m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 592
 593         Matrix4x4_FromArrayFloatGL(&basematrix, rectviewmatrix[side]);
 594         Matrix4x4_Invert_Simple(&tempmatrix, &v->cameramatrix);
 595         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 596         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, v->m);
 597
 598         if (nearplane)
 599                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 600 }
 601
 602 void R_SetViewport(const r_viewport_t *v)
 603 {
 604         gl_viewport = *v;
 605
 606         CHECKGLERROR
 607         qglViewport(v->x, v->y, v->width, v->height);CHECKGLERROR
 608
 609         // FIXME: v_flipped_state is evil, this probably breaks somewhere
 610         GL_SetMirrorState(v_flipped.integer && (v->type == R_VIEWPORTTYPE_PERSPECTIVE || v->type == R_VIEWPORTTYPE_PERSPECTIVE_INFINITEFARCLIP));
 611
 612         // copy over the matrices to our state
 613         gl_viewmatrix = v->viewmatrix;
 614         gl_projectionmatrix = v->projectmatrix;
 615
 616         switch(vid.renderpath)
 617         {
 618         case RENDERPATH_GL20:
 619         case RENDERPATH_CGGL:
 620 //              break;
 621         case RENDERPATH_GL13:
 622         case RENDERPATH_GL11:
 623                 // Load the projection matrix into OpenGL
 624                 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 625                 qglLoadMatrixf(gl_viewport.m);CHECKGLERROR
 626                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 627                 break;
 628         }
 629
 630         // force an update of the derived matrices
 631         gl_modelmatrixchanged = true;
 632         R_EntityMatrix(&gl_modelmatrix);
 633 }
 634
 635 void R_GetViewport(r_viewport_t *v)
 636 {
 637         *v = gl_viewport;
 638 }
 639
 640 static void GL_BindVBO(int bufferobject)
 641 {
 642         if (gl_state.vertexbufferobject != bufferobject)
 643         {
 644                 gl_state.vertexbufferobject = bufferobject;
 645                 CHECKGLERROR
 646                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, bufferobject);
 647                 CHECKGLERROR
 648         }
 649 }
 650
 651 static void GL_BindEBO(int bufferobject)
 652 {
 653         if (gl_state.elementbufferobject != bufferobject)
 654         {
 655                 gl_state.elementbufferobject = bufferobject;
 656                 CHECKGLERROR
 657                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobject);
 658                 CHECKGLERROR
 659         }
 660 }
 661
 662 static void GL_Backend_ResetState(void)
 663 {
 664         unsigned int i;
 665         gl_state.active = true;
 666         gl_state.depthtest = true;
 667         gl_state.alphatest = false;
 668         gl_state.blendfunc1 = GL_ONE;
 669         gl_state.blendfunc2 = GL_ZERO;
 670         gl_state.blend = false;
 671         gl_state.depthmask = GL_TRUE;
 672         gl_state.colormask = 15;
 673         gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
 674         gl_state.lockrange_first = 0;
 675         gl_state.lockrange_count = 0;
 676         gl_state.cullface = v_flipped_state ? GL_BACK : GL_FRONT; // quake is backwards, this culls back faces
 677         gl_state.cullfaceenable = true;
 678         gl_state.polygonoffset[0] = 0;
 679         gl_state.polygonoffset[1] = 0;
 680
 681         CHECKGLERROR
 682
 683         qglColorMask(1, 1, 1, 1);
 684         qglAlphaFunc(GL_GEQUAL, 0.5);CHECKGLERROR
 685         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 686         qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
 687         qglDisable(GL_BLEND);CHECKGLERROR
 688         qglCullFace(gl_state.cullface);CHECKGLERROR
 689         qglEnable(GL_CULL_FACE);CHECKGLERROR
 690         qglDepthFunc(GL_LEQUAL);CHECKGLERROR
 691         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 692         qglDepthMask(gl_state.depthmask);CHECKGLERROR
 693         qglPolygonOffset(gl_state.polygonoffset[0], gl_state.polygonoffset[1]);
 694
 695         if (vid.support.arb_vertex_buffer_object)
 696         {
 697                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 698                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
 699         }
 700
 701         if (vid.support.ext_framebuffer_object)
 702         {
 703                 qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 704                 qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
 705         }
 706
 707         qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
 708         qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
 709
 710         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
 711         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
 712
 713         GL_Color(0, 0, 0, 0);
 714         GL_Color(1, 1, 1, 1);
 715
 716         gl_state.unit = MAX_TEXTUREUNITS;
 717         gl_state.clientunit = MAX_TEXTUREUNITS;
 718         for (i = 0;i < vid.teximageunits;i++)
 719         {
 720                 GL_ActiveTexture(i);
 721                 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
 722                 if (vid.support.ext_texture_3d)
 723                 {
 724                         qglBindTexture(GL_TEXTURE_3D, 0);CHECKGLERROR
 725                 }
 726                 if (vid.support.arb_texture_cube_map)
 727                 {
 728                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);CHECKGLERROR
 729                 }
 730                 if (vid.support.arb_texture_rectangle)
 731                 {
 732                         qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);CHECKGLERROR
 733                 }
 734         }
 735
 736         for (i = 0;i < vid.texarrayunits;i++)
 737         {
 738                 GL_ClientActiveTexture(i);
 739                 GL_BindVBO(0);
 740                 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
 741                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
 742         }
 743
 744         for (i = 0;i < vid.texunits;i++)
 745         {
 746                 GL_ActiveTexture(i);
 747                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
 748                 if (vid.support.ext_texture_3d)
 749                 {
 750                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
 751                 }
 752                 if (vid.support.arb_texture_cube_map)
 753                 {
 754                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
 755                 }
 756                 if (vid.support.arb_texture_rectangle)
 757                 {
 758                         qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
 759                 }
 760                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
 761                 qglLoadIdentity();CHECKGLERROR
 762                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 763                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
 764                 CHECKGLERROR
 765         }
 766         CHECKGLERROR
 767 }
 768
 769 void GL_ActiveTexture(unsigned int num)
 770 {
 771         if (gl_state.unit != num)
 772         {
 773                 gl_state.unit = num;
 774                 if (qglActiveTexture)
 775                 {
 776                         CHECKGLERROR
 777                         qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
 778                         CHECKGLERROR
 779                 }
 780         }
 781 }
 782
 783 void GL_ClientActiveTexture(unsigned int num)
 784 {
 785         if (gl_state.clientunit != num)
 786         {
 787                 gl_state.clientunit = num;
 788                 if (qglActiveTexture)
 789                 {
 790                         CHECKGLERROR
 791                         qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
 792                         CHECKGLERROR
 793                 }
 794         }
 795 }
 796
 797 void GL_BlendFunc(int blendfunc1, int blendfunc2)
 798 {
 799         if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
 800         {
 801                 CHECKGLERROR
 802                 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
 803                 if (gl_state.blendfunc2 == GL_ZERO)
 804                 {
 805                         if (gl_state.blendfunc1 == GL_ONE)
 806                         {
 807                                 if (gl_state.blend)
 808                                 {
 809                                         gl_state.blend = 0;
 810                                         qglDisable(GL_BLEND);CHECKGLERROR
 811                                 }
 812                         }
 813                         else
 814                         {
 815                                 if (!gl_state.blend)
 816                                 {
 817                                         gl_state.blend = 1;
 818                                         qglEnable(GL_BLEND);CHECKGLERROR
 819                                 }
 820                         }
 821                 }
 822                 else
 823                 {
 824                         if (!gl_state.blend)
 825                         {
 826                                 gl_state.blend = 1;
 827                                 qglEnable(GL_BLEND);CHECKGLERROR
 828                         }
 829                 }
 830         }
 831 }
 832
 833 void GL_DepthMask(int state)
 834 {
 835         if (gl_state.depthmask != state)
 836         {
 837                 CHECKGLERROR
 838                 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
 839         }
 840 }
 841
 842 void GL_DepthTest(int state)
 843 {
 844         if (gl_state.depthtest != state)
 845         {
 846                 gl_state.depthtest = state;
 847                 CHECKGLERROR
 848                 if (gl_state.depthtest)
 849                 {
 850                         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 851                 }
 852                 else
 853                 {
 854                         qglDisable(GL_DEPTH_TEST);CHECKGLERROR
 855                 }
 856         }
 857 }
 858
 859 void GL_DepthRange(float nearfrac, float farfrac)
 860 {
 861         if (gl_state.depthrange[0] != nearfrac || gl_state.depthrange[1] != farfrac)
 862         {
 863                 gl_state.depthrange[0] = nearfrac;
 864                 gl_state.depthrange[1] = farfrac;
 865                 qglDepthRange(nearfrac, farfrac);
 866         }
 867 }
 868
 869 void GL_PolygonOffset(float planeoffset, float depthoffset)
 870 {
 871         if (gl_state.polygonoffset[0] != planeoffset || gl_state.polygonoffset[1] != depthoffset)
 872         {
 873                 gl_state.polygonoffset[0] = planeoffset;
 874                 gl_state.polygonoffset[1] = depthoffset;
 875                 qglPolygonOffset(planeoffset, depthoffset);
 876         }
 877 }
 878
 879 void GL_SetMirrorState(qboolean state)
 880 {
 881         if(!state != !v_flipped_state)
 882         {
 883                 // change cull face mode!
 884                 if(gl_state.cullface == GL_BACK)
 885                         qglCullFace((gl_state.cullface = GL_FRONT));
 886                 else if(gl_state.cullface == GL_FRONT)
 887                         qglCullFace((gl_state.cullface = GL_BACK));
 888         }
 889         v_flipped_state = state;
 890 }
 891
 892 void GL_CullFace(int state)
 893 {
 894         CHECKGLERROR
 895
 896         if(v_flipped_state)
 897         {
 898                 if(state == GL_FRONT)
 899                         state = GL_BACK;
 900                 else if(state == GL_BACK)
 901                         state = GL_FRONT;
 902         }
 903
 904         if (state != GL_NONE)
 905         {
 906                 if (!gl_state.cullfaceenable)
 907                 {
 908                         gl_state.cullfaceenable = true;
 909                         qglEnable(GL_CULL_FACE);CHECKGLERROR
 910                 }
 911                 if (gl_state.cullface != state)
 912                 {
 913                         gl_state.cullface = state;
 914                         qglCullFace(gl_state.cullface);CHECKGLERROR
 915                 }
 916         }
 917         else
 918         {
 919                 if (gl_state.cullfaceenable)
 920                 {
 921                         gl_state.cullfaceenable = false;
 922                         qglDisable(GL_CULL_FACE);CHECKGLERROR
 923                 }
 924         }
 925 }
 926
 927 void GL_AlphaTest(int state)
 928 {
 929         if (gl_state.alphatest != state)
 930         {
 931                 gl_state.alphatest = state;
 932                 CHECKGLERROR
 933                 if (gl_state.alphatest)
 934                 {
 935                         qglEnable(GL_ALPHA_TEST);CHECKGLERROR
 936                 }
 937                 else
 938                 {
 939                         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 940                 }
 941         }
 942 }
 943
 944 void GL_ColorMask(int r, int g, int b, int a)
 945 {
 946         int state = r*8 + g*4 + b*2 + a*1;
 947         if (gl_state.colormask != state)
 948         {
 949                 gl_state.colormask = state;
 950                 CHECKGLERROR
 951                 qglColorMask((GLboolean)r, (GLboolean)g, (GLboolean)b, (GLboolean)a);CHECKGLERROR
 952         }
 953 }
 954
 955 void GL_Color(float cr, float cg, float cb, float ca)
 956 {
 957         if (gl_state.pointer_color_enabled || gl_state.color4f[0] != cr || gl_state.color4f[1] != cg || gl_state.color4f[2] != cb || gl_state.color4f[3] != ca)
 958         {
 959                 gl_state.color4f[0] = cr;
 960                 gl_state.color4f[1] = cg;
 961                 gl_state.color4f[2] = cb;
 962                 gl_state.color4f[3] = ca;
 963                 CHECKGLERROR
 964                 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
 965                 CHECKGLERROR
 966         }
 967 }
 968
 969 void GL_LockArrays(int first, int count)
 970 {
 971         if (count < gl_lockarrays_minimumvertices.integer)
 972         {
 973                 first = 0;
 974                 count = 0;
 975         }
 976         if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
 977         {
 978                 if (gl_state.lockrange_count)
 979                 {
 980                         gl_state.lockrange_count = 0;
 981                         CHECKGLERROR
 982                         qglUnlockArraysEXT();
 983                         CHECKGLERROR
 984                 }
 985                 if (count && vid.support.ext_compiled_vertex_array && gl_lockarrays.integer)
 986                 {
 987                         gl_state.lockrange_first = first;
 988                         gl_state.lockrange_count = count;
 989                         CHECKGLERROR
 990                         qglLockArraysEXT(first, count);
 991                         CHECKGLERROR
 992                 }
 993         }
 994 }
 995
 996 void GL_Scissor (int x, int y, int width, int height)
 997 {
 998         CHECKGLERROR
 999         qglScissor(x, y,width,height);
1000         CHECKGLERROR
1001 }
1002
1003 void GL_ScissorTest(int state)
1004 {
1005         if(gl_state.scissortest == state)
1006                 return;
1007
1008         CHECKGLERROR
1009         if((gl_state.scissortest = state))
1010                 qglEnable(GL_SCISSOR_TEST);
1011         else
1012                 qglDisable(GL_SCISSOR_TEST);
1013         CHECKGLERROR
1014 }
1015
1016 void GL_Clear(int mask)
1017 {
1018         CHECKGLERROR
1019         qglClear(mask);CHECKGLERROR
1020 }
1021
1022 // called at beginning of frame
1023 void R_Mesh_Start(void)
1024 {
1025         BACKENDACTIVECHECK
1026         CHECKGLERROR
1027         if (gl_printcheckerror.integer && !gl_paranoid.integer)
1028         {
1029                 Con_Printf("WARNING: gl_printcheckerror is on but gl_paranoid is off, turning it on...\n");
1030                 Cvar_SetValueQuick(&gl_paranoid, 1);
1031         }
1032 }
1033
1034 qboolean GL_Backend_CompileShader(int programobject, GLenum shadertypeenum, const char *shadertype, int numstrings, const char **strings)
1035 {
1036         int shaderobject;
1037         int shadercompiled;
1038         char compilelog[MAX_INPUTLINE];
1039         shaderobject = qglCreateShaderObjectARB(shadertypeenum);CHECKGLERROR
1040         if (!shaderobject)
1041                 return false;
1042         qglShaderSourceARB(shaderobject, numstrings, strings, NULL);CHECKGLERROR
1043         qglCompileShaderARB(shaderobject);CHECKGLERROR
1044         qglGetObjectParameterivARB(shaderobject, GL_OBJECT_COMPILE_STATUS_ARB, &shadercompiled);CHECKGLERROR
1045         qglGetInfoLogARB(shaderobject, sizeof(compilelog), NULL, compilelog);CHECKGLERROR
1046         if (compilelog[0] && (strstr(compilelog, "error") || strstr(compilelog, "ERROR") || strstr(compilelog, "Error") || strstr(compilelog, "WARNING") || strstr(compilelog, "warning") || strstr(compilelog, "Warning")))
1047         {
1048                 int i, j, pretextlines = 0;
1049                 for (i = 0;i < numstrings - 1;i++)
1050                         for (j = 0;strings[i][j];j++)
1051                                 if (strings[i][j] == '\n')
1052                                         pretextlines++;
1053                 Con_Printf("%s shader compile log:\n%s\n(line offset for any above warnings/errors: %i)\n", shadertype, compilelog, pretextlines);
1054         }
1055         if (!shadercompiled)
1056         {
1057                 qglDeleteObjectARB(shaderobject);CHECKGLERROR
1058                 return false;
1059         }
1060         qglAttachObjectARB(programobject, shaderobject);CHECKGLERROR
1061         qglDeleteObjectARB(shaderobject);CHECKGLERROR
1062         return true;
1063 }
1064
1065 unsigned int GL_Backend_CompileProgram(int vertexstrings_count, const char **vertexstrings_list, int geometrystrings_count, const char **geometrystrings_list, int fragmentstrings_count, const char **fragmentstrings_list)
1066 {
1067         GLint programlinked;
1068         GLuint programobject = 0;
1069         char linklog[MAX_INPUTLINE];
1070         CHECKGLERROR
1071
1072         programobject = qglCreateProgramObjectARB();CHECKGLERROR
1073         if (!programobject)
1074                 return 0;
1075
1076         if (vertexstrings_count && !GL_Backend_CompileShader(programobject, GL_VERTEX_SHADER_ARB, "vertex", vertexstrings_count, vertexstrings_list))
1077                 goto cleanup;
1078
1079 #ifdef GL_GEOMETRY_SHADER_ARB
1080         if (geometrystrings_count && !GL_Backend_CompileShader(programobject, GL_GEOMETRY_SHADER_ARB, "geometry", geometrystrings_count, geometrystrings_list))
1081                 goto cleanup;
1082 #endif
1083
1084         if (fragmentstrings_count && !GL_Backend_CompileShader(programobject, GL_FRAGMENT_SHADER_ARB, "fragment", fragmentstrings_count, fragmentstrings_list))
1085                 goto cleanup;
1086
1087         qglLinkProgramARB(programobject);CHECKGLERROR
1088         qglGetObjectParameterivARB(programobject, GL_OBJECT_LINK_STATUS_ARB, &programlinked);CHECKGLERROR
1089         qglGetInfoLogARB(programobject, sizeof(linklog), NULL, linklog);CHECKGLERROR
1090         if (linklog[0])
1091         {
1092                 if (strstr(linklog, "error") || strstr(linklog, "ERROR") || strstr(linklog, "Error") || strstr(linklog, "WARNING") || strstr(linklog, "warning") || strstr(linklog, "Warning"))
1093                         Con_DPrintf("program link log:\n%s\n", linklog);
1094                 // software vertex shader is ok but software fragment shader is WAY
1095                 // too slow, fail program if so.
1096                 // NOTE: this string might be ATI specific, but that's ok because the
1097                 // ATI R300 chip (Radeon 9500-9800/X300) is the most likely to use a
1098                 // software fragment shader due to low instruction and dependent
1099                 // texture limits.
1100                 if (strstr(linklog, "fragment shader will run in software"))
1101                         programlinked = false;
1102         }
1103         if (!programlinked)
1104                 goto cleanup;
1105         return programobject;
1106 cleanup:
1107         qglDeleteObjectARB(programobject);CHECKGLERROR
1108         return 0;
1109 }
1110
1111 void GL_Backend_FreeProgram(unsigned int prog)
1112 {
1113         CHECKGLERROR
1114         qglDeleteObjectARB(prog);
1115         CHECKGLERROR
1116 }
1117
1118 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
1119 {
1120         int i;
1121         if (offset)
1122         {
1123                 for (i = 0;i < count;i++)
1124                         *out++ = *in++ + offset;
1125         }
1126         else
1127                 memcpy(out, in, sizeof(*out) * count);
1128 }
1129
1130 // renders triangles using vertices from the active arrays
1131 int paranoidblah = 0;
1132 void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtriangles, const int *element3i, const unsigned short *element3s, int bufferobject3i, int bufferobject3s)
1133 {
1134         unsigned int numelements = numtriangles * 3;
1135         if (numvertices < 3 || numtriangles < 1)
1136         {
1137                 if (numvertices < 0 || numtriangles < 0 || developer_extra.integer)
1138                         Con_DPrintf("R_Mesh_Draw(%d, %d, %d, %d, %8p, %8p, %i, %i);\n", firstvertex, numvertices, firsttriangle, numtriangles, (void *)element3i, (void *)element3s, bufferobject3i, bufferobject3s);
1139                 return;
1140         }
1141         if (!gl_mesh_prefer_short_elements.integer)
1142         {
1143                 if (element3i)
1144                         element3s = NULL;
1145                 if (bufferobject3i)
1146                         bufferobject3s = 0;
1147         }
1148         if (element3i)
1149                 element3i += firsttriangle * 3;
1150         if (element3s)
1151                 element3s += firsttriangle * 3;
1152         switch (gl_vbo.integer)
1153         {
1154         default:
1155         case 0:
1156         case 2:
1157                 bufferobject3i = bufferobject3s = 0;
1158                 break;
1159         case 1:
1160                 break;
1161         case 3:
1162                 if (firsttriangle)
1163                         bufferobject3i = bufferobject3s = 0;
1164                 break;
1165         }
1166         CHECKGLERROR
1167         r_refdef.stats.meshes++;
1168         r_refdef.stats.meshes_elements += numelements;
1169         if (gl_paranoid.integer)
1170         {
1171                 unsigned int i, j, size;
1172                 const int *p;
1173                 // note: there's no validation done here on buffer objects because it
1174                 // is somewhat difficult to get at the data, and gl_paranoid can be
1175                 // used without buffer objects if the need arises
1176                 // (the data could be gotten using glMapBuffer but it would be very
1177                 //  slow due to uncachable video memory reads)
1178                 if (!qglIsEnabled(GL_VERTEX_ARRAY))
1179                         Con_Print("R_Mesh_Draw: vertex array not enabled\n");
1180                 CHECKGLERROR
1181                 if (gl_state.pointer_vertex)
1182                         for (j = 0, size = numvertices * 3, p = (int *)((float *)gl_state.pointer_vertex + firstvertex * 3);j < size;j++, p++)
1183                                 paranoidblah += *p;
1184                 if (gl_state.pointer_color_enabled)
1185                 {
1186                         if (!qglIsEnabled(GL_COLOR_ARRAY))
1187                                 Con_Print("R_Mesh_Draw: color array set but not enabled\n");
1188                         CHECKGLERROR
1189                         if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1190                                 for (j = 0, size = numvertices * 4, p = (int *)((float *)gl_state.pointer_color + firstvertex * 4);j < size;j++, p++)
1191                                         paranoidblah += *p;
1192                 }
1193                 for (i = 0;i < vid.texarrayunits;i++)
1194                 {
1195                         if (gl_state.units[i].arrayenabled)
1196                         {
1197                                 GL_ClientActiveTexture(i);
1198                                 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
1199                                         Con_Print("R_Mesh_Draw: texcoord array set but not enabled\n");
1200                                 CHECKGLERROR
1201                                 if (gl_state.units[i].pointer_texcoord && gl_state.units[i].arrayenabled)
1202                                         for (j = 0, size = numvertices * gl_state.units[i].arraycomponents, p = (int *)((float *)gl_state.units[i].pointer_texcoord + firstvertex * gl_state.units[i].arraycomponents);j < size;j++, p++)
1203                                                 paranoidblah += *p;
1204                         }
1205                 }
1206                 if (element3i)
1207                 {
1208                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1209                         {
1210                                 if (element3i[i] < firstvertex || element3i[i] >= firstvertex + numvertices)
1211                                 {
1212                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3i array\n", element3i[i], firstvertex, firstvertex + numvertices);
1213                                         return;
1214                                 }
1215                         }
1216                 }
1217                 if (element3s)
1218                 {
1219                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1220                         {
1221                                 if (element3s[i] < firstvertex || element3s[i] >= firstvertex + numvertices)
1222                                 {
1223                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3s array\n", element3s[i], firstvertex, firstvertex + numvertices);
1224                                         return;
1225                                 }
1226                         }
1227                 }
1228                 CHECKGLERROR
1229         }
1230         if (r_render.integer || r_refdef.draw2dstage)
1231         {
1232                 CHECKGLERROR
1233                 if (gl_mesh_testmanualfeeding.integer)
1234                 {
1235                         unsigned int i, j, element;
1236                         const GLfloat *p;
1237                         qglBegin(GL_TRIANGLES);
1238                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1239                         {
1240                                 element = element3i ? element3i[i] : element3s[i];
1241                                 for (j = 0;j < vid.texarrayunits;j++)
1242                                 {
1243                                         if (gl_state.units[j].pointer_texcoord && gl_state.units[j].arrayenabled)
1244                                         {
1245                                                 if (vid.texarrayunits > 1)
1246                                                 {
1247                                                         if (gl_state.units[j].arraycomponents == 4)
1248                                                         {
1249                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1250                                                                 qglMultiTexCoord4f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2], p[3]);
1251                                                         }
1252                                                         else if (gl_state.units[j].arraycomponents == 3)
1253                                                         {
1254                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1255                                                                 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
1256                                                         }
1257                                                         else if (gl_state.units[j].arraycomponents == 2)
1258                                                         {
1259                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1260                                                                 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
1261                                                         }
1262                                                         else
1263                                                         {
1264                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1265                                                                 qglMultiTexCoord1f(GL_TEXTURE0_ARB + j, p[0]);
1266                                                         }
1267                                                 }
1268                                                 else
1269                                                 {
1270                                                         if (gl_state.units[j].arraycomponents == 4)
1271                                                         {
1272                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1273                                                                 qglTexCoord4f(p[0], p[1], p[2], p[3]);
1274                                                         }
1275                                                         else if (gl_state.units[j].arraycomponents == 3)
1276                                                         {
1277                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1278                                                                 qglTexCoord3f(p[0], p[1], p[2]);
1279                                                         }
1280                                                         else if (gl_state.units[j].arraycomponents == 2)
1281                                                         {
1282                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1283                                                                 qglTexCoord2f(p[0], p[1]);
1284                                                         }
1285                                                         else
1286                                                         {
1287                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1288                                                                 qglTexCoord1f(p[0]);
1289                                                         }
1290                                                 }
1291                                         }
1292                                 }
1293                                 if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1294                                 {
1295                                         p = ((const GLfloat *)(gl_state.pointer_color)) + element * 4;
1296                                         qglColor4f(p[0], p[1], p[2], p[3]);
1297                                 }
1298                                 p = ((const GLfloat *)(gl_state.pointer_vertex)) + element * 3;
1299                                 qglVertex3f(p[0], p[1], p[2]);
1300                         }
1301                         qglEnd();
1302                         CHECKGLERROR
1303                 }
1304                 else if (gl_mesh_testarrayelement.integer)
1305                 {
1306                         int i;
1307                         qglBegin(GL_TRIANGLES);
1308                         if (element3i)
1309                         {
1310                                 for (i = 0;i < numtriangles * 3;i++)
1311                                         qglArrayElement(element3i[i]);
1312                         }
1313                         else if (element3s)
1314                         {
1315                                 for (i = 0;i < numtriangles * 3;i++)
1316                                         qglArrayElement(element3s[i]);
1317                         }
1318                         qglEnd();
1319                         CHECKGLERROR
1320                 }
1321                 else if (bufferobject3s)
1322                 {
1323                         GL_BindEBO(bufferobject3s);
1324                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1325                         {
1326                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1327                                 CHECKGLERROR
1328                         }
1329                         else
1330                         {
1331                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1332                                 CHECKGLERROR
1333                         }
1334                 }
1335                 else if (bufferobject3i)
1336                 {
1337                         GL_BindEBO(bufferobject3i);
1338                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1339                         {
1340                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1341                                 CHECKGLERROR
1342                         }
1343                         else
1344                         {
1345                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1346                                 CHECKGLERROR
1347                         }
1348                 }
1349                 else if (element3s)
1350                 {
1351                         GL_BindEBO(0);
1352                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1353                         {
1354                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, element3s);
1355                                 CHECKGLERROR
1356                         }
1357                         else
1358                         {
1359                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, element3s);
1360                                 CHECKGLERROR
1361                         }
1362                 }
1363                 else if (element3i)
1364                 {
1365                         GL_BindEBO(0);
1366                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1367                         {
1368                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, element3i);
1369                                 CHECKGLERROR
1370                         }
1371                         else
1372                         {
1373                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, element3i);
1374                                 CHECKGLERROR
1375                         }
1376                 }
1377         }
1378 }
1379
1380 // restores backend state, used when done with 3D rendering
1381 void R_Mesh_Finish(void)
1382 {
1383 }
1384
1385 int R_Mesh_CreateStaticBufferObject(unsigned int target, void *data, size_t size, const char *name)
1386 {
1387         gl_bufferobjectinfo_t *info;
1388         GLuint bufferobject;
1389
1390         if (!gl_vbo.integer)
1391                 return 0;
1392
1393         qglGenBuffersARB(1, &bufferobject);
1394         switch(target)
1395         {
1396         case GL_ELEMENT_ARRAY_BUFFER_ARB: GL_BindEBO(bufferobject);break;
1397         case GL_ARRAY_BUFFER_ARB: GL_BindVBO(bufferobject);break;
1398         default: Sys_Error("R_Mesh_CreateStaticBufferObject: unknown target type %i\n", target);return 0;
1399         }
1400         qglBufferDataARB(target, size, data, GL_STATIC_DRAW_ARB);
1401
1402         info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_AllocRecord(&gl_state.bufferobjectinfoarray);
1403         memset(info, 0, sizeof(*info));
1404         info->target = target;
1405         info->object = bufferobject;
1406         info->size = size;
1407         strlcpy(info->name, name, sizeof(info->name));
1408
1409         return (int)bufferobject;
1410 }
1411
1412 void R_Mesh_DestroyBufferObject(int bufferobject)
1413 {
1414         int i, endindex;
1415         gl_bufferobjectinfo_t *info;
1416
1417         qglDeleteBuffersARB(1, (GLuint *)&bufferobject);
1418
1419         endindex = Mem_ExpandableArray_IndexRange(&gl_state.bufferobjectinfoarray);
1420         for (i = 0;i < endindex;i++)
1421         {
1422                 info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_RecordAtIndex(&gl_state.bufferobjectinfoarray, i);
1423                 if (!info)
1424                         continue;
1425                 if (info->object == bufferobject)
1426                 {
1427                         Mem_ExpandableArray_FreeRecord(&gl_state.bufferobjectinfoarray, (void *)info);
1428                         break;
1429                 }
1430         }
1431 }
1432
1433 void GL_Mesh_ListVBOs(qboolean printeach)
1434 {
1435         int i, endindex;
1436         size_t ebocount = 0, ebomemory = 0;
1437         size_t vbocount = 0, vbomemory = 0;
1438         gl_bufferobjectinfo_t *info;
1439         endindex = Mem_ExpandableArray_IndexRange(&gl_state.bufferobjectinfoarray);
1440         for (i = 0;i < endindex;i++)
1441         {
1442                 info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_RecordAtIndex(&gl_state.bufferobjectinfoarray, i);
1443                 if (!info)
1444                         continue;
1445                 switch(info->target)
1446                 {
1447                 case GL_ELEMENT_ARRAY_BUFFER_ARB: ebocount++;ebomemory += info->size;if (printeach) Con_Printf("EBO #%i %s = %i bytes\n", info->object, info->name, (int)info->size);break;
1448                 case GL_ARRAY_BUFFER_ARB: vbocount++;vbomemory += info->size;if (printeach) Con_Printf("VBO #%i %s = %i bytes\n", info->object, info->name, (int)info->size);break;
1449                 default: Con_Printf("gl_vbostats: unknown target type %i\n", info->target);break;
1450                 }
1451         }
1452         Con_Printf("vertex buffers: %i element buffers totalling %i bytes (%.3f MB), %i vertex buffers totalling %i bytes (%.3f MB), combined %i bytes (%.3fMB)\n", (int)ebocount, (int)ebomemory, ebomemory / 1048576.0, (int)vbocount, (int)vbomemory, vbomemory / 1048576.0, (int)(ebomemory + vbomemory), (ebomemory + vbomemory) / 1048576.0);
1453 }
1454
1455 void R_Mesh_VertexPointer(const float *vertex3f, int bufferobject, size_t bufferoffset)
1456 {
1457         if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1458                 bufferobject = 0;
1459         if (gl_state.pointer_vertex != vertex3f || gl_state.pointer_vertex_buffer != bufferobject || gl_state.pointer_vertex_offset != bufferoffset)
1460         {
1461                 gl_state.pointer_vertex = vertex3f;
1462                 gl_state.pointer_vertex_buffer = bufferobject;
1463                 gl_state.pointer_vertex_offset = bufferoffset;
1464                 CHECKGLERROR
1465                 GL_BindVBO(bufferobject);
1466                 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), bufferobject ? (void *)bufferoffset : vertex3f);CHECKGLERROR
1467         }
1468 }
1469
1470 void R_Mesh_ColorPointer(const float *color4f, int bufferobject, size_t bufferoffset)
1471 {
1472         // note: this can not rely on bufferobject to decide whether a color array
1473         // is supplied, because surfmesh_t shares one vbo for all arrays, which
1474         // means that a valid vbo may be supplied even if there is no color array.
1475         if (color4f)
1476         {
1477                 if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1478                         bufferobject = 0;
1479                 // caller wants color array enabled
1480                 if (!gl_state.pointer_color_enabled)
1481                 {
1482                         gl_state.pointer_color_enabled = true;
1483                         CHECKGLERROR
1484                         qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1485                 }
1486                 if (gl_state.pointer_color != color4f || gl_state.pointer_color_buffer != bufferobject || gl_state.pointer_color_offset != bufferoffset)
1487                 {
1488                         gl_state.pointer_color = color4f;
1489                         gl_state.pointer_color_buffer = bufferobject;
1490                         gl_state.pointer_color_offset = bufferoffset;
1491                         CHECKGLERROR
1492                         GL_BindVBO(bufferobject);
1493                         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), bufferobject ? (void *)bufferoffset : color4f);CHECKGLERROR
1494                 }
1495         }
1496         else
1497         {
1498                 // caller wants color array disabled
1499                 if (gl_state.pointer_color_enabled)
1500                 {
1501                         gl_state.pointer_color_enabled = false;
1502                         CHECKGLERROR
1503                         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1504                         // when color array is on the glColor gets trashed, set it again
1505                         qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);CHECKGLERROR
1506                 }
1507         }
1508 }
1509
1510 void R_Mesh_TexCoordPointer(unsigned int unitnum, unsigned int numcomponents, const float *texcoord, int bufferobject, size_t bufferoffset)
1511 {
1512         gltextureunit_t *unit = gl_state.units + unitnum;
1513         // update array settings
1514         CHECKGLERROR
1515         // note: there is no need to check bufferobject here because all cases
1516         // that involve a valid bufferobject also supply a texcoord array
1517         if (texcoord)
1518         {
1519                 if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1520                         bufferobject = 0;
1521                 // texture array unit is enabled, enable the array
1522                 if (!unit->arrayenabled)
1523                 {
1524                         unit->arrayenabled = true;
1525                         GL_ClientActiveTexture(unitnum);
1526                         qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1527                 }
1528                 // texcoord array
1529                 if (unit->pointer_texcoord != texcoord || unit->pointer_texcoord_buffer != bufferobject || unit->pointer_texcoord_offset != bufferoffset || unit->arraycomponents != numcomponents)
1530                 {
1531                         unit->pointer_texcoord = texcoord;
1532                         unit->pointer_texcoord_buffer = bufferobject;
1533                         unit->pointer_texcoord_offset = bufferoffset;
1534                         unit->arraycomponents = numcomponents;
1535                         GL_ClientActiveTexture(unitnum);
1536                         GL_BindVBO(bufferobject);
1537                         qglTexCoordPointer(unit->arraycomponents, GL_FLOAT, sizeof(float) * unit->arraycomponents, bufferobject ? (void *)bufferoffset : texcoord);CHECKGLERROR
1538                 }
1539         }
1540         else
1541         {
1542                 // texture array unit is disabled, disable the array
1543                 if (unit->arrayenabled)
1544                 {
1545                         unit->arrayenabled = false;
1546                         GL_ClientActiveTexture(unitnum);
1547                         qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1548                 }
1549         }
1550 }
1551
1552 int R_Mesh_TexBound(unsigned int unitnum, int id)
1553 {
1554         gltextureunit_t *unit = gl_state.units + unitnum;
1555         if (unitnum >= vid.teximageunits)
1556                 return 0;
1557         if (id == GL_TEXTURE_2D)
1558                 return unit->t2d;
1559         if (id == GL_TEXTURE_3D)
1560                 return unit->t3d;
1561         if (id == GL_TEXTURE_CUBE_MAP_ARB)
1562                 return unit->tcubemap;
1563         if (id == GL_TEXTURE_RECTANGLE_ARB)
1564                 return unit->trectangle;
1565         return 0;
1566 }
1567
1568 void R_Mesh_CopyToTexture(int texnum, int tx, int ty, int sx, int sy, int width, int height)
1569 {
1570         R_Mesh_TexBind(0, texnum);
1571         GL_ActiveTexture(0);CHECKGLERROR
1572         qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, tx, ty, sx, sy, width, height);CHECKGLERROR
1573 }
1574
1575 void R_Mesh_TexBindAll(unsigned int unitnum, int tex2d, int tex3d, int texcubemap, int texrectangle)
1576 {
1577         gltextureunit_t *unit = gl_state.units + unitnum;
1578         if (unitnum >= vid.teximageunits)
1579                 return;
1580         // update 2d texture binding
1581         if (unit->t2d != tex2d)
1582         {
1583                 GL_ActiveTexture(unitnum);
1584                 if (unitnum < vid.texunits)
1585                 {
1586                         if (tex2d)
1587                         {
1588                                 if (unit->t2d == 0)
1589                                 {
1590                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1591                                 }
1592                         }
1593                         else
1594                         {
1595                                 if (unit->t2d)
1596                                 {
1597                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1598                                 }
1599                         }
1600                 }
1601                 unit->t2d = tex2d;
1602                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1603         }
1604         // update 3d texture binding
1605         if (unit->t3d != tex3d)
1606         {
1607                 GL_ActiveTexture(unitnum);
1608                 if (unitnum < vid.texunits)
1609                 {
1610                         if (tex3d)
1611                         {
1612                                 if (unit->t3d == 0)
1613                                 {
1614                                         qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1615                                 }
1616                         }
1617                         else
1618                         {
1619                                 if (unit->t3d)
1620                                 {
1621                                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1622                                 }
1623                         }
1624                 }
1625                 unit->t3d = tex3d;
1626                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1627         }
1628         // update cubemap texture binding
1629         if (unit->tcubemap != texcubemap)
1630         {
1631                 GL_ActiveTexture(unitnum);
1632                 if (unitnum < vid.texunits)
1633                 {
1634                         if (texcubemap)
1635                         {
1636                                 if (unit->tcubemap == 0)
1637                                 {
1638                                         qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1639                                 }
1640                         }
1641                         else
1642                         {
1643                                 if (unit->tcubemap)
1644                                 {
1645                                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1646                                 }
1647                         }
1648                 }
1649                 unit->tcubemap = texcubemap;
1650                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1651         }
1652         // update rectangle texture binding
1653         if (unit->trectangle != texrectangle)
1654         {
1655                 GL_ActiveTexture(unitnum);
1656                 if (unitnum < vid.texunits)
1657                 {
1658                         if (texrectangle)
1659                         {
1660                                 if (unit->trectangle == 0)
1661                                 {
1662                                         qglEnable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1663                                 }
1664                         }
1665                         else
1666                         {
1667                                 if (unit->trectangle)
1668                                 {
1669                                         qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1670                                 }
1671                         }
1672                 }
1673                 unit->trectangle = texrectangle;
1674                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1675         }
1676 }
1677
1678 void R_Mesh_TexBind(unsigned int unitnum, int texnum)
1679 {
1680         gltextureunit_t *unit = gl_state.units + unitnum;
1681         if (unitnum >= vid.teximageunits)
1682                 return;
1683         // update 2d texture binding
1684         if (unit->t2d != texnum)
1685         {
1686                 GL_ActiveTexture(unitnum);
1687                 if (unitnum < vid.texunits)
1688                 {
1689                         if (texnum)
1690                         {
1691                                 if (unit->t2d == 0)
1692                                 {
1693                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1694                                 }
1695                         }
1696                         else
1697                         {
1698                                 if (unit->t2d)
1699                                 {
1700                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1701                                 }
1702                         }
1703                 }
1704                 unit->t2d = texnum;
1705                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1706         }
1707         // update 3d texture binding
1708         if (unit->t3d)
1709         {
1710                 GL_ActiveTexture(unitnum);
1711                 if (unitnum < vid.texunits)
1712                 {
1713                         if (unit->t3d)
1714                         {
1715                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1716                         }
1717                 }
1718                 unit->t3d = 0;
1719                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1720         }
1721         // update cubemap texture binding
1722         if (unit->tcubemap != 0)
1723         {
1724                 GL_ActiveTexture(unitnum);
1725                 if (unitnum < vid.texunits)
1726                 {
1727                         if (unit->tcubemap)
1728                         {
1729                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1730                         }
1731                 }
1732                 unit->tcubemap = 0;
1733                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1734         }
1735         // update rectangle texture binding
1736         if (unit->trectangle != 0)
1737         {
1738                 GL_ActiveTexture(unitnum);
1739                 if (unitnum < vid.texunits)
1740                 {
1741                         if (unit->trectangle)
1742                         {
1743                                 qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1744                         }
1745                 }
1746                 unit->trectangle = 0;
1747                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1748         }
1749 }
1750
1751 static const float gl_identitymatrix[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1};
1752
1753 void R_Mesh_TexMatrix(unsigned int unitnum, const matrix4x4_t *matrix)
1754 {
1755         gltextureunit_t *unit = gl_state.units + unitnum;
1756         if (matrix && matrix->m[3][3])
1757         {
1758                 // texmatrix specified, check if it is different
1759                 if (!unit->texmatrixenabled || memcmp(&unit->matrix, matrix, sizeof(matrix4x4_t)))
1760                 {
1761                         float glmatrix[16];
1762                         unit->texmatrixenabled = true;
1763                         unit->matrix = *matrix;
1764                         CHECKGLERROR
1765                         Matrix4x4_ToArrayFloatGL(&unit->matrix, glmatrix);
1766                         GL_ActiveTexture(unitnum);
1767                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1768                         qglLoadMatrixf(glmatrix);CHECKGLERROR
1769                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1770                 }
1771         }
1772         else
1773         {
1774                 // no texmatrix specified, revert to identity
1775                 if (unit->texmatrixenabled)
1776                 {
1777                         unit->texmatrixenabled = false;
1778                         unit->matrix = identitymatrix;
1779                         CHECKGLERROR
1780                         GL_ActiveTexture(unitnum);
1781                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1782                         qglLoadIdentity();CHECKGLERROR
1783                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1784                 }
1785         }
1786 }
1787
1788 void R_Mesh_TexCombine(unsigned int unitnum, int combinergb, int combinealpha, int rgbscale, int alphascale)
1789 {
1790         gltextureunit_t *unit = gl_state.units + unitnum;
1791         CHECKGLERROR
1792         switch(vid.renderpath)
1793         {
1794         case RENDERPATH_GL20:
1795         case RENDERPATH_CGGL:
1796                 // do nothing
1797                 break;
1798         case RENDERPATH_GL13:
1799                 // GL_ARB_texture_env_combine
1800                 if (!combinergb)
1801                         combinergb = GL_MODULATE;
1802                 if (!combinealpha)
1803                         combinealpha = GL_MODULATE;
1804                 if (!rgbscale)
1805                         rgbscale = 1;
1806                 if (!alphascale)
1807                         alphascale = 1;
1808                 if (combinergb != combinealpha || rgbscale != 1 || alphascale != 1)
1809                 {
1810                         if (combinergb == GL_DECAL)
1811                                 combinergb = GL_INTERPOLATE_ARB;
1812                         if (unit->combine != GL_COMBINE_ARB)
1813                         {
1814                                 unit->combine = GL_COMBINE_ARB;
1815                                 GL_ActiveTexture(unitnum);
1816                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
1817                                 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
1818                         }
1819                         if (unit->combinergb != combinergb)
1820                         {
1821                                 unit->combinergb = combinergb;
1822                                 GL_ActiveTexture(unitnum);
1823                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
1824                         }
1825                         if (unit->combinealpha != combinealpha)
1826                         {
1827                                 unit->combinealpha = combinealpha;
1828                                 GL_ActiveTexture(unitnum);
1829                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
1830                         }
1831                         if (unit->rgbscale != rgbscale)
1832                         {
1833                                 unit->rgbscale = rgbscale;
1834                                 GL_ActiveTexture(unitnum);
1835                                 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, unit->rgbscale);CHECKGLERROR
1836                         }
1837                         if (unit->alphascale != alphascale)
1838                         {
1839                                 unit->alphascale = alphascale;
1840                                 GL_ActiveTexture(unitnum);
1841                                 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, unit->alphascale);CHECKGLERROR
1842                         }
1843                 }
1844                 else
1845                 {
1846                         if (unit->combine != combinergb)
1847                         {
1848                                 unit->combine = combinergb;
1849                                 GL_ActiveTexture(unitnum);
1850                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1851                         }
1852                 }
1853                 break;
1854         case RENDERPATH_GL11:
1855                 // normal GL texenv
1856                 if (!combinergb)
1857                         combinergb = GL_MODULATE;
1858                 if (unit->combine != combinergb)
1859                 {
1860                         unit->combine = combinergb;
1861                         GL_ActiveTexture(unitnum);
1862                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1863                 }
1864                 break;
1865         }
1866 }
1867
1868 void R_Mesh_ResetTextureState(void)
1869 {
1870         unsigned int unitnum;
1871
1872         BACKENDACTIVECHECK
1873
1874         CHECKGLERROR
1875         switch(vid.renderpath)
1876         {
1877         case RENDERPATH_GL20:
1878         case RENDERPATH_CGGL:
1879                 for (unitnum = 0;unitnum < vid.teximageunits;unitnum++)
1880                 {
1881                         gltextureunit_t *unit = gl_state.units + unitnum;
1882                         if (unit->t2d)
1883                         {
1884                                 unit->t2d = 0;
1885                                 GL_ActiveTexture(unitnum);
1886                                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1887                         }
1888                         if (unit->t3d)
1889                         {
1890                                 unit->t3d = 0;
1891                                 GL_ActiveTexture(unitnum);
1892                                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1893                         }
1894                         if (unit->tcubemap)
1895                         {
1896                                 unit->tcubemap = 0;
1897                                 GL_ActiveTexture(unitnum);
1898                                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1899                         }
1900                         if (unit->trectangle)
1901                         {
1902                                 unit->trectangle = 0;
1903                                 GL_ActiveTexture(unitnum);
1904                                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1905                         }
1906                 }
1907                 for (unitnum = 0;unitnum < vid.texarrayunits;unitnum++)
1908                 {
1909                         gltextureunit_t *unit = gl_state.units + unitnum;
1910                         if (unit->arrayenabled)
1911                         {
1912                                 unit->arrayenabled = false;
1913                                 GL_ClientActiveTexture(unitnum);
1914                                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1915                         }
1916                 }
1917                 for (unitnum = 0;unitnum < vid.texunits;unitnum++)
1918                 {
1919                         gltextureunit_t *unit = gl_state.units + unitnum;
1920                         if (unit->texmatrixenabled)
1921                         {
1922                                 unit->texmatrixenabled = false;
1923                                 unit->matrix = identitymatrix;
1924                                 CHECKGLERROR
1925                                 GL_ActiveTexture(unitnum);
1926                                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1927                                 qglLoadIdentity();CHECKGLERROR
1928                                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1929                         }
1930                 }
1931                 break;
1932         case RENDERPATH_GL13:
1933         case RENDERPATH_GL11:
1934                 for (unitnum = 0;unitnum < vid.texunits;unitnum++)
1935                 {
1936                         gltextureunit_t *unit = gl_state.units + unitnum;
1937                         if (unit->t2d)
1938                         {
1939                                 unit->t2d = 0;
1940                                 GL_ActiveTexture(unitnum);
1941                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1942                                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1943                         }
1944                         if (unit->t3d)
1945                         {
1946                                 unit->t3d = 0;
1947                                 GL_ActiveTexture(unitnum);
1948                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1949                                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1950                         }
1951                         if (unit->tcubemap)
1952                         {
1953                                 unit->tcubemap = 0;
1954                                 GL_ActiveTexture(unitnum);
1955                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1956                                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1957                         }
1958                         if (unit->trectangle)
1959                         {
1960                                 unit->trectangle = 0;
1961                                 GL_ActiveTexture(unitnum);
1962                                 qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1963                                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1964                         }
1965                         if (unit->arrayenabled)
1966                         {
1967                                 unit->arrayenabled = false;
1968                                 GL_ClientActiveTexture(unitnum);
1969                                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1970                         }
1971                         if (unit->texmatrixenabled)
1972                         {
1973                                 unit->texmatrixenabled = false;
1974                                 unit->matrix = identitymatrix;
1975                                 CHECKGLERROR
1976                                 GL_ActiveTexture(unitnum);
1977                                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1978                                 qglLoadIdentity();CHECKGLERROR
1979                                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1980                         }
1981                         if (unit->combine != GL_MODULATE)
1982                         {
1983                                 unit->combine = GL_MODULATE;
1984                                 GL_ActiveTexture(unitnum);
1985                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1986                         }
1987                 }
1988                 break;
1989         }
1990 }